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Gold at deposits of volcanogenic massive sulfides in general, and its mineralogical relationships at the Zlaté Hory - West deposit
Bobko, Simon Mário ; Zachariáš, Jiří (advisor) ; Goliáš, Viktor (referee)
It is known from previous studies that VMS deposits were formed in the underwater environment in volcanically active areas, e.g. mid-ocean ridges or volcanic arcs. The occurrence is known in many countries around the world, and they are one of the most important sources of zinc, copper, lead, silver and gold in association with secondary elements such as Co, Sn, Ba, S, Se, Mn, Cd, In, Bi, Te, Ga, Ge. Massive sulfide mineralization can occur in host rock types ranging from mafic, felsic to siliciclastic. Typical ore minerals occurring in VMS deposits are, for example, pyrite, chalcopyrite, sphalerite and galena. In the context of gold-enriched VMS deposits, of the world's approximately 800 known VMS deposits, anomalous gold occurrences appear only in some of them. Despite the rare occurrence of gold-rich VMS deposits, Au-VMS are of great economic importance. The task of the research part of the bachelor's thesis is to state the geology and mineralogy of VMS deposits, the distribution and mineralogical bond in these deposits, what are the mechanisms of gold redistribution and what is the geology and mineralogy of the Zlaté Hory - West deposit (ZH-Západ). The stratiform polymetallic deposit Zlaté Hory - West is defined by the mineral association Cu-Zn-(Au). Previous investigations and historical...
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The Monte Carlo Stochastic Method for Price Simulation
MÜLLEROVÁ, Sindy
This bachelor thesis focuses on predicting gold prices using the Monte Carlo model and utilizes data obtained from Yahoo Finance. The data used for the simulation covers the period from 2000 to 2023. Based on this data, values for the next 3 years are simulated. The prediction model provides optimistic, neutral, and pessimistic scenarios of future price development, represented by the upper quartile, median, and lower quartile. The findings show that in the optimistic scenario (upper quartile), gold prices continue to rise, indicating a consistently strong market trend. In contrast, the pessimistic scenario (lower quartile) indicates only a slight decline in prices, suggesting price stability. The neutral scenario (median) shows a slightly rising trend, ensuring that the value of the initial investment is preserved. The analysis carried out in this paper assesses the profitability of gold investment mainly due to the positive and stable price trend and offers valuable insights for investment decision-making.
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The Role of the Gold in the Central Banking
Kluzová, Denisa ; Bažantová, Ilona (advisor) ; Dupáková, Lenka (referee)
Role of gold in central banking Abstract The first chapter is devoted to the characteristics of central banks as institutions that have a monopoly on the issue of cash money, conduct monetary policy and regulate the banking system. The first central banks emerged in the 17th century. However, they differed from the contemporary central banks. Their primary task was to provide financial resources to the sovereign. They gradually gained more power over time and became the central banks that exist today. Contemporary central banks usually have powers such as issuing cash money, conducting monetary policy, regulation and supervision of the banking sector. Central banks compile their balance sheets, which are statements of the amount and structure of assets and liabilities. Gold is among the items that appear on central bank balance sheets. The second chapter is important for understanding how the gold standard function. It explains concepts such as the pure standard and the modified gold standard, which covers the gold bullion standard, the gold reserve standard and the gold exchange standard. The third chapter describes the evolution of the gold standard since the 1930s when monetary blocks, consisting of states with similiar views on the continuation of the gold standard, were formed. These included the gold...
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Proposal for the Creation of an Investment Portfolio of a Fund of Qualified Investors
Kazda, Tomáš ; Brauner, Roman (referee) ; Rejnuš, Oldřich (advisor)
The subject of the bachelor's thesis is the elaboration of a proposal for an investment portfolio of a fund of qualified investors focused on gold mining companies. For this purpose, a model fund is created and it is made a selection of companies according to its statute. After that the companies are analyzed, verified and finally compared to determine the final ratio of individual companies in the fund. At the end of the work, a proposal for the management of the fund with the recommended composition of its portfolio is compiled.
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Surface Plasmon Resonances on Colloidal Nanoparticles
Beránek, Jiří ; Brzobohatý,, Oto (referee) ; Šikola, Tomáš (advisor)
The presented diploma thesis is focused on the Localized Surface Plasmons (LSP). The far-field optical response of the colloidal solutions of gold nanoparticles caused by LSP was investigated and compared with the numerical calculations. For the simulations, the Discrete Dipole Approximation (DDA) and Finite-Difference Time Domain (FDTD) techniques were employed. In particular, the shape and size effects of spherical particles and nanorods were studied. The simulations performed by both methods are in a good agreement for the spheres. For the nanorods, the resonance was found to be affected markedly by their geometry. Also, broader resonance peaks were found. This effect was assigned to the sample size distribution and its influence is discussed by comparing the simulations with experiments. In addition, synthesis of nanorods was carried out as well. Finally, the results on the study of optical properties of silver clusters formed under equilibrium conditions are presented.
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Study of catalytic decomposition of silica
Štubian, Martin ; Kolíbal, Miroslav (referee) ; Bábor, Petr (advisor)
This thesis deals with catalytic decomposition of silica using electron microscopy and Auger spectroscopy. The thesis is primarily focused on the Au-Si phase, which is created during in the reaction. In the theoretical part, the principle of used methods is described and recherche on the catalytic decomposition of silica is presented. The practical part contains the results of the measurements and their interpretation.
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Nanoparticles preparation by green synthesis
Kortusová, Dominika ; Valušová,, Eva (referee) ; Šimšíková, Michaela (advisor)
This thesis deals with green synthesis of noble metals nanoparticles. The first part contains secondary literature research which maps both the traditional and newly developed techniques of nanoparticles preparation. Most attention is given to the various types of green synthesis, which constitute an environmentally friendly alternative to industrially applied methods. The second part deals with the preparation of noble metal nanoparticles using tea broths. The section describes the entire synthesis process and includes photographic documentation. A total of eight colloidal solutions were prepared, four of each metal. The nanoparticles were subsequently analyzed using UV-vis spectroscopy. A time-lapse spectroscopic description of each synthesis was also undertaken. Furthermore, the size distribution of the particles by volume was measured and compared with the pictures obtained by scanning electron microscopy. The results have showed that tea broths, especially those from black tea and rooibos, are suitable for the biosynthesis of stable noble metal nanoparticles.
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Synthesis of colloidal gold nanorods for biomedical applications
Valkovičová, Jiřina ; Bernard, Vladan (referee) ; Drbohlavová, Jana (advisor)
Diplomová práce se zabývá výrobou a využitím zlatých koloidních nanotyčinek v biomedicínských aplikacích. Konkrétně se zaměřuje na tři základní funkce nanočástic v analýze - transportní, separační a především zobrazovací. V části o využití nanočástic pro zobrazování je hlavní zájem věnován zejména povrchové plazmonové rezonanci zlatých nantyčinek. Dále je práce zaměřena na využití nanotyčinek pro termální terapii. Následující část je věnována vhodným modifikacím povrchu, hlavně za účelem zmírnění toxicity částic. Závěrem teoretické části jsou způsoby přípravy zlatých koloidních nanotyčinek a techniky jejich následné analýzy. V navazující experimetální části jsou uvedeny postupy, podmínky a výsledky provedených pokusů.
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